100-150 Question 51
Select 3A network administrator is troubleshooting a file transfer issue between two devices on the same network. The administrator notices that one device is using TFTP while the other is using SFTP. What key differences between these protocols could cause the issue?
- A
TFTP is a connectionless protocol, while SFTP is connection-oriented.
- B
TFTP uses UDP, whereas SFTP uses TCP.
- C
TFTP does not support encryption, while SFTP provides secure file transfer using encryption.
- D
SFTP uses port 21 by default, whereas TFTP uses port 69.
Show answer and explanation
Correct answers: A, B, C
Explanation
The issue arises from the fundamental differences between TFTP and SFTP. TFTP is a lightweight, connectionless protocol utilizing UDP, and it lacks encryption. SFTP, on the other hand, is a secure, connection-oriented protocol that uses TCP. These differences make the two protocols incompatible for direct communication. Additionally, SFTP operates over SSH (port 22), not port 21, which is used by FTP.
- A. Correct.
Correct: TFTP is a connectionless protocol that uses UDP, while SFTP is connection-oriented and relies on TCP. This fundamental difference affects how data is transferred and may cause compatibility issues.
- B. Correct.
Correct: TFTP uses UDP as a transport protocol, making it less reliable but faster, while SFTP uses TCP for reliable, connection-oriented transfers.
- C. Correct.
Correct: TFTP does not include encryption and is less secure, while SFTP is designed to securely transfer files using encryption methods.
- D. Incorrect.
Incorrect: SFTP does not use port 21 by default. Instead, it operates over SSH and typically uses port 22. Port 21 is used by FTP.